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I know this is years old, but just in case someone else has this problem....

I just had this problem and fixed it quite easily.

Like you, my ink cartridge flooded the ink bay and caused the printer to complain about a pump stall.

Mine was fixed by taking the cover off (u don't need to) and cleaning all the ink off the white strip.

Basically, there's a white piece of plastic with a metal rectangle on it. it sites to the left of the thing under the print heads (the part doesn't move. Under the big part with all the print heads) and to the right of the paper rollers.

It's also the thing that stops the print heads from moving when they're not to be moving.

Mine was covered in black ink. I cleaned it off and turned on the printer to find it working again and no more "pump stall" messages.

I don't know what the plastic piece is for, but cleaning it fixed my problem. Also there's no "pumps" in the printer (it uses gravity to feed the ink).

You can download the Lexmark X4270 driver by visiting the Lexmark website at http://bit.ly/gKXn7F. Select your operating system, download and execute the file. Follow the instructions on your computer screen.

For your scanning concern, especially when scanning documents, you will need the Lexmark OCR scan software to do the job. The scan software is available only on the installation disc that came with your printer. If you lost the disc, please contact Lexmark Technical Support Center for additional assistance.